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Desalination and Water Treatment Volume 57, 2016 - Issue 42
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Articles

Optimization of nitrobenzene wastewater treatment with O3/H2O2 in a rotating packed bed using response surface methodology

Weizhou JiaoShanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan030051, Shanxi, China, Tel./Fax: +86 351 3921986;Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan030051, Shanxi, ChinaCorrespondence[email protected]
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Lisheng YuShanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan030051, Shanxi, China, Tel./Fax: +86 351 3921986;Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan030051, Shanxi, ChinaCorrespondence[email protected]
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Zhirong FengShanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan030051, Shanxi, China, Tel./Fax: +86 351 3921986;Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan030051, Shanxi, ChinaCorrespondence[email protected]
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Liang GuoShanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan030051, Shanxi, China, Tel./Fax: +86 351 3921986;Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan030051, Shanxi, ChinaCorrespondence[email protected]
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Yonghong WangShanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan030051, Shanxi, China, Tel./Fax: +86 351 3921986;Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan030051, Shanxi, ChinaCorrespondence[email protected]
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Youzhi LiuShanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan030051, Shanxi, China, Tel./Fax: +86 351 3921986;Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan030051, Shanxi, ChinaCorrespondence[email protected]
Pages 19996-20004 | Received 10 Feb 2015, Accepted 24 Sep 2015, Published online: 26 Oct 2015
 
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Abstract

Effects on the removal efficiency of nitrobenzene treated by O3/H2O2 in a rotating packed bed (RPB) were optimized with response surface methodology (RSM). Interaction effects between influence of H2O2 concentration, gas-phase ozone concentration, liquid flow rate, and high-gravity factor on the removal efficiency of nitrobenzene wastewater treatment with O3/H2O2 in a RPB were investigated. The results indicate that the influence priority on nitrobenzene removal is high-gravity factor, gas-phase ozone concentration, H2O2 concentration, and liquid flow rate. Significant interaction effects of H2O2 concentration and gas-phase ozone concentration, gas-phase ozone concentration, and high-gravity factor were observed. The optimum treatment conditions after optimizing were H2O2 concentration 5.7 mmol L−1, gas-phase ozone concentration 50 mg L−1, liquid flow rate 125 L h−1, and high-gravity factor 100. Under the optimal reaction conditions, the actual removal efficiency of nitrobenzene could reach 76.1% fast in a short-treatment time of 10 min. And the theoretical value was 78.2%. The deviation between the experiment test result and the predicted value of RSM-fitting equation was 2.68%, which indicate that the RSM-fitting equation could be used to predict the removal efficiency of nitrobenzene treated by O3/H2O2 in a RPB and optimize the treatment conditions.

Acknowledgements

The authors greatly appreciated for the support of the Excellent Youth Science and Technology Foundation of Province Shanxi of China (2014021007) and Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi (201316).

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